JP3445953B2 - Coil inserter for stator winding - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil inserter for inserting a coil of a stator winding into a slot of a stator core of a rotating electric machine of an electric motor.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view of a conventional coil inserter 100. In the inserter tool 101, a plurality of blades 102 are arranged in a cylindrical shape at predetermined intervals so as to correspond to the teeth between the slots of the stator core 200. An alignment tool 1 is attached to the tip of the blade 102.
03 is fitted. This alignment tool 103
Is for guiding the blade to the inner peripheral surface of the stator core. A stripper 104 is arranged inside the plurality of blades 102 arranged in a cylindrical shape. The stripper 104 is driven by a drive source 105 via a shaft 106, and is attached so as to be movable relative to the blade 102. That is, the stripper 104 is capable of advancing and retracting in the axial direction of the blade 102 (movement in the vertical direction in FIG. 4).

Further, a wedge guide 107 is planted in a wedge guide holder 108 in a cylindrical shape at a predetermined interval, and the wedge guide 107 is arranged outside the blade 102. The wedge guide 107 is configured to hold a wedge 110 made of insulating paper or the like on the outer side thereof. In addition, the wedge guide 107 is attached to the blade 1
Wedge pusher 10 moved relative to 02
9 is equipped.

After inserting the wound coil 300 into the gap, the alignment tool 103 is fitted to the tip of the blade 102, and the alignment tool 103 is fixed to the stator core 20.
No. 0 is inserted into the inner surface of the stator core 103, and the tip of the wedge guide 107 is guided by the alignment tool 103.
The stator core 200 is moved relative to the coil inserter 100 until it contacts the end of the slot 00.
Then, the drive source 105 is driven to move the stripper 104 forward (upward in FIG. 4). Wound coil 30
0 is pushed up by the stripper 104 and the stator core 200
Inserted in the slot. Further, when the drive source 105 pushes the wedge pusher 109 to push up the wedge guide holder 108, the wedge guide 107 is also pushed up, the wedge 110 is inserted into the slot, and the slot opening in which the coil 300 is inserted is covered. .

The stripper 104 passes through the end surface (upper end surface in FIG. 4) of the stator core 200 on the side opposite to the insertion side and passes through the coil 3
00 is completely inserted into the slot of the stator core 200, the wedge guide 107 reaches the end surface position of the stator core 200 on the side opposite to the insertion side, and the wedge 110 is in a state of covering all the slot openings. Is stopped, the alignment tool 103 is removed, the stator core 200 is moved in the axial direction of the blade 102, and the stator core 200 is removed from the coil inserter 100.
The blade 102 and the wedge guide 107 separate from the stator core 200, but the coil 300 and the wedge 1
10 is prevented from moving due to friction or the like, and the stator core 2
Will be held in the 00 slot.

[0006]

In the above-described conventional coil inserter 100, the stripper 104 moves to directly push up the wound coil 300 for transfer and insert it into the slot of the stator core 200. The coil 300 wound by the stripper 104 is transferred,
In addition, since it is inserted into the slot, a specific coil may be crushed by the pushing force of the stripper 104, and the coil 300 may be clogged in the gap between the blades 102, which is a so-called locking phenomenon. Further, since the coil is transferred by the stripper, the coil may be damaged by the blade. Therefore, in order to suppress the occurrence of this locking phenomenon or the like, it is necessary to pay attention to the selection of the coil material diameter and the setting of the coil filling rate in the slot.

Since the coil 300 is pushed up by the stripper 104 and guided by the blade 102 to insert the coil 300 into the slot of the stator core 200, the length of the blade 102 is at least the length of the stator core 200. (Length in the vertical direction in FIG. 4) is required. That is, in FIG. 4, the tip of the wedge guide 107 is the stator core 2
No. 00 slot core end 200
When the relative movement of the coil inserter 100 and the coil inserter 100 is stopped and the stripper 104 is moved to start inserting the coil 300 into the slot, the blade 102 moves the stator core 200.
If the stripper 104 is moved to a position beyond the upper end surface of the stator core 200, the coil 300 cannot be completely inserted into the slot unless the upper end of the coil is reached. In order to completely insert the coil 300 into the slot, the length of the blade 102 is at least the length of the stator core 200. Incidentally, JP-A-54-12
Japanese Patent No. 6905 proposes a coil inserter that shortens the blade length.

Further, since the conventional coil inserter 100 requires a push-up mechanism such as the wedge pusher 109, the device as the coil inserter 100 becomes long in the axial direction, which makes it difficult to save space.

Therefore, the present invention aims to provide a coil inserter which can solve the above-mentioned conventional problems and avoid the locking phenomenon. Another object is to provide a coil inserter that has a simple mechanism and can be downsized.

[0010]

SUMMARY OF THE INVENTION A coil inserter of the present invention is configured such that one end of a plurality of blades for guiding the coil in a slot of a stator core is connected and fixed to a blade holder to support the coil on the inner peripheral side of the blade. Arrange the strippers to support. This stripper is fixed to the base that supports the entire inserter. Then, by pressing the stator core in the axial direction of the electric motor by the stator core inserting means and inserting the blade along the slots of the stator core, the coil supported by the stripper is fixed. It was inserted in the slot of the child iron core.

In particular, the blade holder is movable back and forth. Further, a wedge guide that holds both ends of the wedge and supports the back surface of the wedge in the longitudinal direction is provided, and both ends of the wedge guide are connected and fixed to the stripper and the base, respectively. The coil inserter described above is used, and the coil is inserted into the slot of the stator core by moving the stator core forward and backward relative to the coil inserter. Also, the coil insertion into the slot is started by moving the stator core forward and backward relative to the coil inserter, and the blade holder is moved forward and backward until the coil reaches a preset position of the stator core. However, after the coil reaches the set position, the blade holder is also moved back and forth according to the forward and backward movement of the stator core,
By inserting the coil, the occurrence of locking phenomenon was prevented. Further, by moving the stator core forward and backward relative to the coil inserter, the wedge can be inserted into the slot without pushing up the wedge.

[0012]

FIG. 1 is a perspective view of a coil inserter 1 according to an embodiment of the present invention and a schematic view of inserting a coil wound around a stator core using the coil inserter 1. . A wedge guide 12 that supports the wedge 11 from the inside is fixed to the base 10 of the coil inserter 1 in a cylindrical shape at a predetermined interval. A stripper 15 is fixed to the other end of the wedge guide 12. The wedge guides 12 are spaced so as to correspond to the respective slots of the stator core 40 on which the wound coil 30 is to be mounted, and the outer surface of each wedge guide 12 is configured to hold the attached wedge 11. Has been done. Further, in order to compensate for the insufficient rigidity of the cylindrical portion formed by the wedge guide 12 and the wedge 11 between the base 10 and the stripper 15, in the present embodiment, the base 10 and the stripper 15 are connected by the support column 20, and the stripper 15 is It is held on the base 10. If the wedge guide 12 has high rigidity, it is not always necessary to provide the support column 20.

In the internal space surrounded by the wedge guide 12 arranged in a cylindrical shape, a blade holder is arranged so as to be movable in the axial direction (vertical direction in FIG. 1) while being guided by the wedge guide 12. In this embodiment, since the base 10 and the stripper 15 are connected by the support column 20, the blade holder 13 is provided with a hole through which the support column 20 passes, and the blade holder 13 is guided by the support column 20. It is configured to be slidable in the vertical direction.

The blade holder 13 includes a stator core 40.
A plurality of blades 1 for guiding the coil 30 to the slots of
6 are erected in a cylindrical shape at a predetermined interval. Each blade 16 corresponds to a tooth portion between the slots of the stator core 40, and each blade 16 is erected at the same interval as the tooth interval of the stator core 40. A connecting rod 19 is fixed to the center of the blade holder 13, and the connecting rod 19 penetrates a hole provided in the stripper 15 and extends upward in FIG.

An alignment tool 7 is attached to the other end of the blade 16 so as to be freely attached. The alignment tool 7 is inserted into a connecting rod 19 through a hole provided in the center of the alignment tool 7 and attached to the other end of the blade 16, and the pin 18 holds the alignment tool 7 at the attachment position to the other end of the blade 16. Is configured.

The alignment tool 7 has ridges and grooves formed at a predetermined pitch on its outer peripheral surface, and each ridge has a stator core 4
It is configured to engage with each slot of 0. The tip of the blade 16 is engaged with the groove portion.

A wedge case 14 is mounted movably in the axial direction so as to enclose the wedge guide 12 arranged in a cylindrical shape. Further, reference numeral 50 is a stator pusher which constitutes a stator core insertion means for inserting the stator core 40 into the blade 16. The stator pusher 50 and the connecting rod 19 described above constitute a stator core insertion means. As will be described later, the wedge case 14 and the base 10
A spring 21 or the like is provided between the wedge case 1 and
The upper tip end position of 4 may be held at a position that substantially coincides with the position of the stripper 15.

The above is the configuration of one embodiment of the coil inserter 1 of the present invention. Next, using this coil inserter 1, the coil 3 wound around the slot of the stator core 40
The operation of inserting 0 will be described with reference to the coil insertion operation explanatory diagrams shown in FIGS. 1, 2 and 3. In addition,
In the example shown in FIGS. 2 and 3, a spring 21 or the like is provided between the wedge case 14 and the base 10, and the upper end position of the wedge case 14 is held by the spring 21 at a position substantially matching the position of the stripper 15. It is configured to do.

First, the pin 18 is removed, the alignment tool 7 is removed from the tip of the blade 16, and the connecting rod 19 is also removed. Then, the stator core 40 in which the coil 30 wound in advance is to be inserted
The blades 16 are mounted in the gap between the blades 16 as shown in FIGS. 1 and 2A.

Next, the stator core 40 is placed on the upper part of the coil inserter 1 in which the wound coil 30 is set, and each slot of the stator core 40 and each ridge of the alignment tool 7 are engaged. Stator core 40 at the matching position
Position and position the stator core 40 with the stator pusher 50.
Push down. The slots of the stator core 40 and the ridges of the alignment tool 7 engage with each other, and the alignment tool 7
The stator core 40 descends while being guided by the ridges and the blades 16 of the stator core 4, and as shown in FIG.
Lower the lower end of 0 until it contacts the wedge 11 case. Further, subsequently, as shown in FIG. 3A, the stator core 40 and the wedge case 14 are pushed down until the tip of the blade 16 and the arrangement tool reach the upper end position of the stator core 40. The foot of the stator pusher 50 or the length of the connecting rod 19 is adjusted so that the stator pusher 50 does not come into contact with the tip of the connecting rod 19 until the push-down position is reached. Desirably, since the stator core 40 and the connecting rod 19 are pushed down in synchronization with each other, as described later, the tip of the blade 16 is fixed to the stator core 4.
When the upper end position of 0 is reached, as shown in FIG. It is good to put it. The connecting rod 19 may be fixed to the stator pusher instead of being fixed to the blade holder 13, and the blade holder 13 may be pressed by the tip of the connecting rod.

At this time, as shown in FIG. 3A, the stripper 15 moves relative to the stator core 40 and is inserted up to the middle of the stator core 40. As a result, the wound coil 30 is inserted up to the middle portion of the slot of the stator core 40. Further, the wedge 11 and the wedge guide engage with the slots of the stator core 40, and the wedges 11 are inserted into the slots of the coil 30.
Will be inserted into the upper surface (side surface of the opening of the slot).

However, the point different from the conventional one is that it is the stator core 40 that is moved, not the stripper 15, so the stripper 15, the blade 16 and the wound coil 30 do not move relative to each other. . Therefore, the locking phenomenon (coil clogging) does not physically occur.
The stator core 40 descends, and the wound coil 30 is inserted into the slot of the stator core 40 so that the coil 30 is inserted.
Even if the phenomenon of moving the coil occurs, since the coil 30 hardly moves between the blades 16, the locking phenomenon does not occur.

Next, the pin 18 which fixes the alignment tool 7 and the blade holder 13 via the connecting rod 19 is removed, the alignment tool 7 is removed, and the stator pusher 50 is pushed down, so that the stator core 40 and the wedge case. 14, and further via the connecting rod 19, the blade holder 13 is pushed down to the final position against the force of the spring 21. That is, the stripper 15 is pushed down until it reaches the upper end position of the stator core 40. In the present embodiment, the stripper 15 is adjusted so as to reach the upper end position of the stator core 40 when the blade holder 13 is pushed down until it comes into contact with the base 10 (FIG. 3).
(See (b)).

At this time, since the blade holder 13 and the stator core 40 are pushed down in synchronization with each other, no relative movement occurs between the blade 16 and the stator core 40. However, since the stripper 15 is fixed to the base 10, the stripper 15 moves relative to the stator core 40, and the wound coil 30 is completely inserted into the slot. Further, the wedge 11 held by the wedge holder 13 arranged between the base 10 and the stripper 15 is in a state of being inserted over the entire length of the slot. As a result, the insertion of the coil 30 into the slot and the wedge 11
Insertion is complete. Moreover, even during this operation, the stator core 40 and the blade 16 are both pushed down in synchronization with each other, and the wound coil 30 is not pushed up, so that the locking phenomenon does not occur. Further, since the blade 16 also moves (lowers) together with the movement (lowering) of the stator core 40, the blade 16 always plays the role of a guide for the stator core 40.
The length may be shorter than the length of the stator core 40, and can be shortened also in this embodiment.

Finally, when the force pushing down the stator core 40 is released, the wedge case 14 and the stator core 40 are pushed up by the force of the spring 21 as shown in FIG. 3 (c). At this time, the coil 30 inserted in the slot remains in the slot, the wedge 11 held by the wedge holder and inserted in the slot also remains in the slot, and only the wedge holder separates from the stator core 40. Furthermore, if the stator core 40 is moved in the axial direction of the blade 16 and removed from the blade 16, the coil 3
The insertion work into the 0 slot is completed.

As described above, in the present embodiment, the stripper 15 remains fixed and does not move, and the wound coil 30 to be inserted into the slot is not attached to the stator core to be inserted. Although it moves relative to the blade 16 on which the coil 30 is mounted, until the tip of the blade 16 reaches the upper end surface of the stator core,
There is no relative movement with respect to the coil 30 blade 16. Then, thereafter, until the stripper 15 reaches the upper end surface of the stator core and the coil insertion is completed, the blade 16 and the stator core move together in synchronization, so that the occurrence of the rocking phenomenon can be prevented. Further, it does not move the wedge holder, but only moves the stator core 40. Therefore, a mechanism for pushing up the coil 30 and a mechanism for pushing up the wedge holder are not required, and the blade length can be shortened, which is small in size. The coil inserter 1 having a simple structure can be obtained. Further coil 30
It is also possible to prevent the rocking phenomenon that is blocked.

In the above embodiment, the spring 21 is used.
However, it is not always necessary to provide the spring 21. Furthermore, the wedge case is not always necessary.

[0028]

According to the present invention, it is possible to obtain a small-sized coil inserter that does not cause a locking phenomenon, has a simple mechanism. Further, since the locking phenomenon can be prevented, the center of the material diameter of the coil 30 can be freely selected, and the filling rate of the coil 30 into the slot of the stator core 40 can be increased. Also, with a simple mechanism, downsizing,
Since the height can be reduced, a low-cost and space-saving coil inserter can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention and a schematic view when a coil wound around a stator core is inserted using the embodiment.

FIG. 2 is an explanatory diagram of a work operation of inserting a coil into the stator core according to the same embodiment.

FIG. 3 is a continuation of the explanatory diagram of the work operation shown in FIG.

FIG. 4 is a schematic explanatory diagram of a conventional coil inserter.

[Explanation of symbols]

1 coil inserter 10 base 11 wedges 12 Wedge Guide 13 Blade holder 14 wedge case 15 strippers 16 blades 18 pin 19 connecting rod 20 props 21 spring 30 coils 40 Stator core 50 Stator pusher

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hideki Oka 3580 Kobaba, Oshinomura, Minamitsuru-gun, Yamanashi Prefecture FANUC CORPORATION (56) References JP-A-9-215281 (JP, A) (58) Survey Fields (Int.Cl. ⁷ , DB name) H02K 15/085

Claims (6)

(57) [Claims] 1. A coil inserter for inserting a coil of a stator winding of an electric motor into a slot of a stator core, wherein a plurality of blades for guiding the coil to the slot of the stator core are connected to one end of the blade. A stator core insertion means that includes a blade holder that is fixed and supports the blade, a stripper that supports the coil arranged on the inner peripheral side of the blade, and a base that supports and fixes the stripper and supports the entire inserter. By pressing the stator core in the axial direction of the electric motor and inserting the blade along the slots of the stator core to insert the coil supported by the stripper into the slot of the stator core. A coil inserter for a stator winding, which is characterized in that 2. The coil inserter for a stator winding according to claim 1, wherein the blade holder is movable back and forth. 3. A wedge guide, which holds both ends of the wedge and longitudinally supports the back surface of the wedge,
3. The coil inserter for a stator winding according to claim 1, wherein both ends of the wedge guide are connected and fixed to the stripper and the base, respectively. 4. The coil inserter of the stator winding according to claim 1, 2 or 3, is used, and the stator core is moved forward and backward relative to the coil inserter so that the coil is inserted into the slot of the stator core. A coil insertion method characterized by inserting. 5. The coil inserter of the stator winding according to claim 2, wherein the coil insertion into the slot is started by moving the stator core forward and backward relative to the coil inserter. Until the preset position of the stator core is reached, the blade holder is not advanced or retracted, and after the coil reaches the set position, depending on the advance or retraction of the stator core, the blade holder is also advanced or retracted,
A coil insertion method, characterized in that a coil is inserted. 6. The coil inserting method according to claim 5, wherein the wedge is also inserted into the slot without pushing up the wedge by moving the stator core forward and backward relative to the coil inserter.